Eliminate CVA6 dependencies within the PAU

[RaulMurillo]

To make a more flexible code (so the PAU could be extended with new features, or adapted to other cores), there are some dependencies that should be removed. More precisely, all the params within the pau_top.sv referencing ariane_pkg and riscv_pkg should be replaced.
This would make the PAU to be core-agnostic, in a similar way as FPnew works. Then, a specialization layer should be included to adapt the PAU to the different cores (in this case, the CVA6), similarly as fpu_wrap.sv.

P.S.: Ideally, the PAU could be an independent repo, but I know this implies much extra work.

[RaulMurillo]

I did some modifications in a branch to eliminate the aforementioned dependencies, but I do not have all the infrastructure to check if the changes are correct.

Can you check if everything works the same?

[davidmallasen]

I have added a "Getting Started" section in the README when trying to test your branch.
When executing your branch I get the following error:

#############  Autofindloop Analysis  ###############
#############  Loop found at time 11390 ns ###############
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#ASSIGN#114 @ sub-iteration 0
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#IMPLICIT-WIRE(cmdbusy_o)#49 @ sub-iteration 1
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
#     Assigning reg to (val=0)
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#ASSIGN#114 @ sub-iteration 2
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
################# END OF LOOP #################
# ** Error (suppressible): (vsim-3601) Iteration limit 10000000 reached at time 11390 ns.

[davidmallasen]

Working in https://github.com/RaulMurillo/PERCIVAL/tree/ft/agnostic-pau

[wwwuxy]

I have added a "Getting Started" section in the README when trying to test your branch. When executing your branch I get the following error:

#############  Autofindloop Analysis  ###############
#############  Loop found at time 11390 ns ###############
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#ASSIGN#114 @ sub-iteration 0
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#IMPLICIT-WIRE(cmdbusy_o)#49 @ sub-iteration 1
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
#     Assigning reg to (val=0)
#   Active process: /ariane_tb/dut/i_dm_top/i_dm_mem/#ASSIGN#114 @ sub-iteration 2
#     Source: /home/david/Documents/repos/RaulMurillo/PERCIVAL/corev_apu/riscv-dbg/src/dm_top.sv:191
################# END OF LOOP #################
# ** Error (suppressible): (vsim-3601) Iteration limit 10000000 reached at time 11390 ns.

my error is same as you，which we talk in issue #4

[davidmallasen]

I didn't look into that back in the day. @RaulMurillo do you remember?

[RaulMurillo]

Uff, a lot has happened since then.
I made no additional changes, so I don't know where the problem can be.